JP2003059384A - Remote control device for circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely reset a circuit breaker from a tripped state even when a handle stays between the on position and off position by using a remote control device using an electromagnetic linear actuator as a driver. SOLUTION: In the remote control device with a two-step control electromagnetic linear actuator combining a moving piece having a permanent magnet with an operating coil for circuit breaker handle operations for on, off and reset, when resetting a circuit breaker from a tripped state with a handle between the on position and off position, the actuator is excited in the on direction to return the moving piece to the on position, and then actuates it from there to the off position to provide sufficient inertia to the moving piece with the magnetic thrust, to thus secure required reset operating force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker (auto circuit breaker) for wiring, an earth leakage breaker, and a remote operation device for a circuit breaker which drives a handle of the breaker to an open / close position by remote control. More specifically, it relates to a control method of a remote operation device configured by using an electromagnetic linear actuator as a drive source.

[0002]

2. Description of the Related Art As an external accessory device to the above-mentioned circuit breaker, a remote operation device is known in which a circuit breaker mounted on a control panel or the like is opened and closed by remote operation from a central command room. Further, as this remote operation device, a device using an electromagnetic linear actuator in place of the conventional motor drive system has been previously proposed as Japanese Patent Application No. 2000-273107 by the same applicant as the present invention,
Next, an outline of the electromagnetic linear actuator and a remote operation device for a circuit breaker using the actuator will be described with reference to FIGS. 8 and 9.

First, FIG. 8 is a principle diagram of an electromagnetic linear actuator.
Is a mover (plunger) having permanent magnets 3 magnetized in the longitudinal direction on both left and right sides, 4, 5 are yokes arranged on both sides of the mover 3 and 6 is a yoke 4, 5 Central leg 4
Operation coils wound around a and 5a, and 6a is a coil frame (bobbin), and the yokes 4 and 5 and the operation coil 6 constitute a stator.

Here, the distance between the N and S magnetic poles of the permanent magnet 3 attached to the mover 2 (the total length of the mover 2) is A, the yoke 4,
The distance between the central leg and the outer leg of the E-shaped magnetic core of 5 is set to B, and the distances A and B are set to B <A <2B,
The mover 2 is guided and supported in the direction of the arrow (the vertical direction in the drawing) via a guide mechanism (not shown). With the above configuration, when the mover 2 is at the solid line position shown and the operation coil 6 is not excited, the permanent magnet 3 and the E-shaped yokes 4, 5 are
The mover 2 is attracted and held at this position by the magnetic attraction force acting between On the other hand, when a DC current is applied to the operation coil 6 to excite it from this state, the central legs 4 of the yokes 4 and 5 are excited.
a and 5a, and N and S poles appear on the magnetic pole surfaces of the outer legs 4b, 4c, 5b and 5c due to the magnetomotive force corresponding to the direction of the exciting current, and magnetic repulsion between the N and S poles of the permanent magnet 3. ， Suction force comes into play. Here, in the yoke 4 on the left side, the central pole 4a is the N pole, the outer leg 4b. 4c is the south pole, and the right yoke 5 has the center pole 5a as the south pole and the outer leg 5
When the current direction of the operation coil 6 is controlled so that b and 5c become the N pole, the mover 2 is driven upward from the solid line position shown by the magnetic thrust acting between the operation coil 6 and the permanent magnet 3 to move as shown by the chain line. . If the direction of the current flowing through the operating coil 6 is switched from this state to reverse the polarity of the magnetic pole, the mover 2
Reverses from the position indicated by the chain line to the original position indicated by the solid line. That is, each time the direction of the exciting current flowing through the operation coil 6 is switched, the mover 2 reverses and moves from one operating position to the other operating position.

Next, a remote control device for a circuit breaker using the above-mentioned electromagnetic linear actuator as a drive source is shown in FIG.
This is explained in (a) and (b). In the figure, 8 is a circuit breaker,
Reference numeral 8a is an opening / closing operation handle (a swinging operation type handle) of the circuit breaker, 9 is a remote operation device as an external accessory device, and the remote operation device 9 is the electromagnetic linear actuator 1 described above and the guide rail 1a indicates an arrow. A forked attachment 10 coupled to the lower surface of a mover 2 which is slidably guided in a direction. The attachment 10 is connected to a handle 8a of the circuit breaker 8 when attached to the circuit breaker 8. ing.

Then, with respect to the remote operation device 9,
When an exciting current is applied to the operation coil 6 of the electromagnetic linear actuator 1 based on an opening / closing command from the outside, the mover 2 is moved in the ON direction and the OFF direction by the magnetic thrust corresponding to the direction of the exciting current, and the breaker. O of the handle 8a of
Drive to N, OFF position. The remote control device 9
Is equipped with an ON / OFF position switch (a limit switch for position detection) in the moving path of the mover 2, and when the mover 2 connected to the handle 8a reaches the ON / OFF stroke end during operation, the position switch The energization of the operation coil 6 is stopped by the detection signal. Further, FIG. 9B is a diagram showing ON / OFF of the handle 8a, trip display, and reset position.

On the other hand, the structure and operation of the circuit breaker 8 are well known, and the handle 8a protruding from the breaker case has a movable contact of the breaker via an opening / closing mechanism portion which is a combination of a toggle type link and an opening / closing spring. Further, the opening / closing mechanism is connected to an overcurrent trip device, an earth leakage trip device, etc. via a latch mechanism. With such a configuration, when the handle 8a is tilted from the OFF position to the ON position and from the ON position to the OFF position, the movable contact oscillates due to the reversing operation of the opening / closing mechanism unit which interlocks with this, and the main circuit contact becomes O.
N, OFF. In addition, in this ON / OFF operation, the operating force for reversing the opening / closing spring of the opening / closing mechanism is applied to the handle 8.
It needs to be added to a.

Further, when the trip device operates due to overcurrent or electric leakage of the main circuit, the latch mechanism releases and the opening / closing mechanism part trips, thereby opening the movable contactor and interrupting the current. In the trip operation, the fulcrum position of the opening / closing spring is changed by releasing the latch mechanism, and the movable contactor is automatically opened. In this case, when the remote operation device 9 is not used (the handle 8a is in an unrestrained state), the handle 8a is driven by the movement of the link mechanism of the opening / closing mechanism section and moves from the ON position to the trip display position (Fig. 9 (b)). reference)
Although the trip operation is displayed by moving to, the handle 8a is restrained by the mover 2 of the electromagnetic linear actuator 1 and stays in the ON position to reach the trip display position when the remote operation device 9 is attached, as will be described later. Does not move.

After the circuit breaker 8 has tripped, the handle 8a is turned off to bring it from the trip display position to the reset position shown in FIG. 9 (b) for resetting (engaging the latch mechanism), and then again. The breaker is turned on by turning it on. In this reset operation, a large operating force needs to be applied to the handle 8a in order to hook the latch of the opening / closing mechanism on the latch receiver.

FIG. 10 shows the thrust-displacement characteristics of the electromagnetic linear actuator 1 and the reaction force-displacement characteristics of the handle of the circuit breaker, which were actually measured by the inventors, for the prototype of the remote operation device having the above-described configuration. Shown in. In the figure, the horizontal axis indicates OFF from the ON position of the handle 8a.
Distance to position (distance (mm)), vertical axis is force (force
(N)), (+) is the force acting in the ON direction, (-) is OFF
The force acting in the direction and the characteristic lines A and B respectively turn on and off the operation coil 6 of the electromagnetic linear actuator 1 shown in FIG.
Thrust-displacement characteristics when excited in the FF direction, characteristic line C is thrust-displacement characteristics in the non-excited state, and characteristic line D is the reaction force applied to the handle 8a when the circuit breaker 8 is in the trip operation state and the reset operation is performed. -Represents displacement characteristics.

In this characteristic diagram, the circuit breaker is turned on.
Operation coil 6 of electromagnetic linear actuator 1 during operation
When is excited in the ON direction, the handle 8a moves O due to the thrust energy in the ON direction acting on the mover 2 (the area of the + side force (foce) surrounded by the characteristic line A (force × distance)).
Switch from FF position to ON position. Further, when the OFF operation is performed, the steering wheel is moved from the ON position to the OFF position by receiving the thrust energy in the OFF direction (the area of the minus side force (foce) surrounded by the characteristic line B shown in the figure (force x distance)) which acts on the mover. Switch.

On the other hand, when the electromagnetic linear actuator is not excited, the distance from the ON position is 6.5 mm.
In the range, the thrust force (characteristic line C) by the permanent magnet of the mover exceeds the reaction force (characteristic line D) of the handle 8a. As a result, in the state after the trip of the circuit breaker (the operation coil 6 of the electromagnetic linear actuator is not excited), the handle 8a stops at the ON position by the magnetic thrust of the permanent magnet, and the trip display position (Fig. 9 (b ) See).

When the operating coil 6 is excited in the OFF direction to reset the circuit breaker from the state after the trip operation, the following operation is performed. That is, FIG.
As shown in the characteristic diagram of 0, immediately before the reset position, the reaction force (the force in the negative direction) of the handle 8a represented by the characteristic line D increases rapidly, and the static thrust (characteristic line B) of the electromagnetic linear actuator is increased. Although it is above the limit, when the operating coil 6 is excited in the OFF direction and the mover 2 is driven with the ON position (normally, the handle 8a is stopped at the ON position during trip operation) as the start point, the above-mentioned OFF operation results. Owing to the inertial force of the mover 2 that receives thrust energy, the handle 8a becomes O
The circuit breaker is reset by switching from the N position to the RESET position.

[0014]

By the way, the above-described remote operation device using the electromagnetic linear actuator as a drive source has the following problems to be solved in terms of operation. That is, the remote operation device 9 needs to be able to turn on and off the circuit breaker by manual operation when the power cannot be used as a measure against a power failure or the like, and therefore the electromagnetic linear actuator 1 is movable as described above. The child 2 is equipped with a handle for manual operation.

When the resetting after the trip operation of the circuit breaker is manually performed without the remote operation, a sufficient force is applied to the handle of the mover 2 to manually perform the operation.
There is no problem if it is confirmed that the handle 8a of the circuit breaker has moved to the reset position, but when the mover 2 is moved to a halfway position, the remote operation device is used again while stopping the manual reset operation. When the operating coil 6 of the electromagnetic linear actuator 1 is excited in the OFF direction to reset the circuit breaker by the magnetic thrust, the reset operation becomes impossible as described below.

That is, the characteristic line C (the magnetic thrust of the permanent magnet in the non-excited state) and the characteristic line D in the characteristic diagram of FIG.
The distance (distance) is 0 from the relationship with (the reaction force of the steering wheel).
In the range of up to 6.5 mm, the thrust force of the permanent magnet (characteristic line C) exceeds the reaction force in the + direction of the steering wheel (characteristic line D) as described above, so in this range the manual reset operation is interrupted and the manual reset operation is stopped. When the handle is released, the handle returns to the ON position, but the magnetic thrust (characteristic line C) is less than the reaction force (characteristic line D) of the handle in the OFF direction range over a distance of 6.5 mm, especially at a distance of 9 to 20 mm. In the range of, the reaction force in the (-) direction of the handle exceeds the thrust of the permanent magnet (characteristic line C), so if the manual reset operation is stopped before the circuit breaker is completely reset, the handle Is ON
It is pushed back in the direction. And a distance of 6.5
When retracted to the range of up to 9 mm, the reaction force of the handle in the (+) direction exceeds the magnetic thrust of the permanent magnet, and as a result, the handle stops near the P position shown in the middle between the ON position and the OFF position. Resulting in. In this P position, the handle stops when the circuit breaker trips without using the remote control device.
It corresponds to the trip display position of.

By the way, if the operating coil 6 of the remote control device 9 is excited in the OFF direction while the handle of the circuit breaker is stopped at the position P in FIG. Is in the P position, the thrust energy is smaller than that in the case of starting from the ON position and exciting in the OFF direction. For this,
The inertial force acting on the mover 2 is insufficient and the reaction force energy in the (-) direction of the handle cannot be exceeded, and as a result, the handle 8a stops before the reset position before the circuit breaker is reset, The reset operation by the remote operation device may not be performed.

The present invention has been made in view of the above points, and when the circuit breaker is reset after the trip operation with the remote operation device of the electromagnetic linear actuator attached, the handle is set to the ON position. Circuit breaker improved so that reset operation can be performed reliably by devising the control algorithm of the electromagnetic linear actuator based on the position information of the mover at that time even when it is stopped in the middle of the OFF position It is an object of the present invention to provide a remote control device of.

[0019]

In order to achieve the above object, according to the present invention, the handle is connected to a handle of a circuit breaker, and the handle is turned on and off in response to a command from the outside.
F. A remote operation device for a circuit breaker driven to a reset position, wherein the device is a combination of a mover with a permanent magnet connected to a handle of the circuit breaker and a stator having an operation coil wound around a yoke. It becomes a two-position operation type electromagnetic linear actuator, and the handle of the circuit breaker is turned in the ON and OFF directions by the magnetic thrust acting between the stator and the mover in accordance with the direction of the current passing through the operating coil. If the handle is stopped midway between the ON position and the OFF position when the circuit breaker is turned OFF when the circuit breaker is turned OFF, the mover of the electromagnetic linear actuator connected to the handle is turned ON once from the stop position. After returning to the position, control means is provided for switching the energizing current of the operating coil so as to drive from the ON position toward the OFF position (claim 1). Its control means specifically configured in the manner as follows follow.

(1) As control means, an ON / OFF operation switch for externally issuing a circuit breaker open / close command and an O for detecting the position of the mover of the electromagnetic linear actuator
An N and OFF position detection switch, and an arithmetic processing unit for switching and controlling the direction of current flowing through the operation coil of the electromagnetic linear actuator based on signals from the operation switch and the position detection switch (claim 2).

(2) In the preceding paragraph (1), the control means is combined with an alarm switch for detecting the trip operation state of the circuit breaker, and the alarm switch detects the trip operation of the circuit breaker, and the electromagnetic linear Only when the mover of the actuator is stopped between the ON position and the OFF position, the mover connected to the handle is temporarily returned from the stop position to the ON position, and then driven from the ON position toward the OFF position. The energizing current of the operating coil is controlled to be switched (claim 3).

As described above, after the circuit breaker has tripped, the electromagnetic linear actuator is once turned on even when the handle is stopped in the middle of the ON position and the OFF position due to a halfway manual reset operation or the like. By exciting in the direction to return the mover to the ON position and then exciting it in the OFF direction, the mover obtains the inertial force due to the thrust energy with the ON position as the starting point to move the handle of the circuit breaker to the reset position. Can be reliably driven up to.

Further, as described in the above item (2), the control means is combined with an alarm switch for detecting the trip operation state of the circuit breaker, and the operation coil is excited by judging whether the circuit breaker is in the trip state or not. The control causes the mover of the remote control device to be in the OFF position while the main circuit contact of the circuit breaker is OFF, even though it is not in the state after the trip operation due to a malfunction of the circuit breaker switching mechanism. If the remote operation device does not move to the intermediate position and is stopped (the remote operation device does not recognize that the circuit breaker is OFF because the OFF detection switch does not operate), give an OFF command to the remote operation device. However, the electromagnetic linear actuator does not operate because there is no input from the alarm switch. Therefore, it is possible to prevent a malfunction such that the circuit breaker is turned on by returning the handle to the ON position.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
~ It demonstrates based on FIG. 4 and the Example shown in FIGS. [Embodiment 1] FIGS. 1 to 4 show an embodiment corresponding to claims 1 and 2 of the present invention. FIG. 1 is a flowchart showing the operation of a remote operation device, and FIG. 2 is a drive of the remote operation device. The control circuit, FIGS. 3 and 4 are operation time charts of the remote control device.

First, in the drive control circuit of FIG.
Is a power supply circuit, 12 and 13 are ON operation relays and OFF operation relays that excite the operation coil 6 of the electromagnetic linear actuator 1 in the ON and OFF directions, and 14 and 15 are ON operation switches that give an opening / closing command from the outside, and OFF operations. Switches 16, 16 and 17 are an ON position detection switch and an OFF position detection switch arranged at ON and OFF positions (stroke ends) on the moving path of the mover 2 of the electromagnetic linear actuator 1, and 18 is the ON and OFF positions.
Based on the operation information of the OFF position detection switches 16 and 17,
An arithmetic processing circuit for controlling the electromagnetic linear actuator 1 according to a procedure according to a predetermined algorithm when the circuit breaker is turned on, off, or reset, 19 is an output command of the arithmetic processing circuit 18, and the ON operation relay 12, OFF It is a drive element for operating the operation relay 13.

In the drive control circuit described above, the ON operation relay 1
The operation coil 6 is excited in the ON direction (+) during the operation of No. 2 and the operation coil 6 is excited in the OFF direction (-) during the operation of the OFF operation relay 13 to drive the mover 2 in the ON or OFF direction. In addition, the mover 2 is turned on and off
When moved to the position, the position is detected by the operation of the ON position detection switch 16 or the OFF position detection switch 17.

Then, in order to open and close the circuit breaker,
ON operation switch 14 or OFF operation switch 1
When an opening / closing command is input to 5, the mover 2 is in a steady ON / OFF position and the ON / OFF detection switches 16 and 17 detect the position as shown in the flowchart of FIG. 1 and the time chart of FIG. If you are in the state of doing, O
At the time of N operation, the operation coil 6 is (+) excited by the input, thereby driving the mover 2 from the OFF position to the ON position, switching the circuit breaker to ON, and following this movement, detecting the OFF position. Switch 17 turns from ON to OFF, ON position detection switch 16 turns from OFF to O
Switch to the N state. Further, when the circuit breaker is turned off, the operation coil 6 is excited by (-), whereby the mover 2 is driven from the ON position to the OFF position to switch the circuit breaker to OFF, and the ON position detection switch 17 is activated. ON to OFF, OFF position detection switch 16
Is switched from OFF to ON, the excitation of the operation coil 6 is stopped, and the opening / closing operation is completed.

When the reset operation is performed in the trip state of the circuit breaker, the mover 2 connected to the handle stops at the ON position due to the thrust of the permanent magnet, and the ON position detection switch 16 detects the position. For example, by giving a command to the OFF operation switch 15, the operation coil 6 of the electromagnetic linear actuator 1 is excited in the (-) direction,
As described above, the mover 2 is moved to the reset position by the thrust having the ON position as the start point, and the circuit breaker is reset.

On the other hand, after the trip operation of the circuit breaker,
As described above, the mover 2 of the linear actuator stops at an intermediate position between the ON position and the OFF position due to a halfway manual operation of the remote operation device 1, and therefore the ON / OFF is performed.
In this case, a reset command is given to the OFF operation switch 15 in order to reset the circuit breaker using the remote operation device 9 while the detection signals of the position detection switches 16 and 17 are not input to the arithmetic processing circuit 18. First, the electromagnetic linear actuator 1 is drive-controlled in a procedure according to the following algorithm.

That is, as shown in the processing step portion # 1 surrounded by a chain line in the flowchart of FIG. 1 and the time chart of FIG. 4, the operation coil 6 of the linear actuator is temporarily (+) turned on by the input of the OFF operation switch 15. Excited in the direction to turn on the mover 2 from the intermediate stop position
Drive back to position. When it is confirmed by this operation that the mover 2 has returned to the ON position from the signal of the ON position detection switch 16, the operation coil 6 is excited in the (-) direction to drive the mover 2 toward the OFF position in the subsequent step. To do.
Then, the handle moves together with the mover 2 to the reset position and the circuit breaker is reset. At the same time, when the OFF position detection switch 17 detects this reset state, the excitation of the operation coil 2 is stopped and a series of operations is ended. .

[Second Embodiment] Next, the drive control circuit of the first embodiment is combined with an alarm switch attached to the circuit breaker as a trip position detection switch (attached switch for detecting a trip state of the circuit breaker). An embodiment corresponding to claim 3 of the present invention for driving and controlling the remote operation device 9 will be described with reference to FIGS.

In this embodiment, as shown in the drive control circuit of FIG. 6, an arithmetic processing circuit 18 is combined with an alarm switch 20, and based on the information (operation signal) from the alarm switch 20, the flow chart of FIG. As shown in the process step part # 2 surrounded by a chain line and the time chart of FIG. 7, the drive control of the remote operation device 9 is performed after the judgment whether the circuit breaker is in the trip state is added to the algorithm. I am trying to do it.

That is, in the above-described first embodiment, even when the circuit breaker is not in the trip state, when the circuit breaker is turned off or reset, the mover 2 is set to the ON position and the O position.
If the stop position is in the middle of the FF position, the electromagnetic linear actuator 1 is once driven in the ON direction, and is driven in the OFF direction in the subsequent step. On the other hand, in the second embodiment, the electromagnetic linear actuator 1 is temporarily turned ON only under the condition that the circuit breaker is in the trip state and the movable element 2 of the actuator is stopped at the intermediate position between ON and OFF. Drives and turns off in subsequent steps
Drive in the direction.

As a result, the mover 2 of the remote control device 9 does not move to the OFF position while the circuit breaker is in the OFF state, even though it is not after the trip operation.
When it is stopped at an intermediate position between N and OFF, the alarm switch 20
Since there is no signal input from, the electromagnetic linear actuator 1 does not operate OFF. Therefore, the handle connected to the mover 2 does not return to the ON position once and the circuit breaker does not turn on carelessly, which may cause the circuit breaker to be turned on carelessly and cause an electric shock accident. You can prevent such troubles and ensure safety.

[0035]

As described above, according to the present invention, in a remote control device for a circuit breaker using an electromagnetic linear actuator as a drive source, when the circuit breaker is turned off, the handle is turned on and off. When it is stopped in the middle of, the energizing current of the operating coil is set so that the mover of the electromagnetic linear actuator connected to the handle is returned from the stop position to the ON position and then driven from the ON position to the OFF position. By providing the control means for switching the circuit breaker, even after the trip of the circuit breaker, even if the handle is stopped midway between the ON position and the OFF position due to a halfway manual reset operation, etc. The mover is turned on by exciting the actuator once in the ON direction, returning the mover to the ON position, and then exciting it in the OFF direction. It is possible to reliably drive the handle of the circuit breaker to the reset position to obtain the inertial force due to the thrust energy and starting point location.

Further, according to the third aspect of the present invention, it is possible to determine whether or not the circuit breaker is in the trip state by combining the alarm switch for detecting the trip operation state of the circuit breaker. When there is no circuit breaker in the OFF state, the mover of the remote operation device is turned ON without moving to the OFF position due to a malfunction of the opening / closing mechanism.
When it is stopped at an intermediate position between OFF and OFF, the mover is turned ON once even if an OFF command is given to the remote operation device 9.
There is no chance that the circuit breaker will be returned to the position and the circuit breaker will not be mistakenly turned on.This will prevent problems such as electric shock accidents caused by the circuit breaker being inadvertently turned on and ensuring high safety. .

[Brief description of drawings]

FIG. 1 is a flowchart showing the contents of arithmetic processing of a remote control device according to a first embodiment of the present invention.

FIG. 2 is a drive control circuit diagram of a remote controller for executing the flowchart of FIG.

FIG. 3 is a time chart showing the operation of the drive control circuit of FIG. 2 during normal ON / OFF operation.

[Fig. 4] ON and OFF when the circuit breaker trips
2 is a time chart showing the reset operation of the drive control circuit of FIG. 2 in the case of driving the steering wheel stopped at the intermediate position of

FIG. 5 is a flowchart showing the contents of arithmetic processing of the remote operation device according to the second embodiment of the present invention.

FIG. 6 is a drive control circuit diagram of a remote controller for executing the flowchart of FIG.

[Fig. 7] ON and OFF when the circuit breaker trips
6 is a time chart showing the reset operation of the drive control circuit of FIG. 6 in the case of driving the steering wheel stopped at the intermediate position in the reset position to the reset position.

FIG. 8 is a principle diagram of the configuration and operation of an electromagnetic linear actuator adopted in the remote control device of the present invention.

FIG. 9 is a schematic diagram of a remote operation device for a circuit breaker using the electromagnetic linear actuator of FIG. 8 as a drive source.
Shows a state in which a remote control device is attached to the circuit breaker, and (b) shows the operating positions of the handle of the circuit breaker.

10 is a diagram showing thrust-displacement characteristics of an electromagnetic linear actuator and reaction force-displacement characteristics of a handle of a circuit breaker in the remote control device of FIG.

[Explanation of symbols]

1 Electromagnetic linear actuator 2 mover 3 permanent magnet 4,5 Stator yoke 6 operation coil 8 circuit breakers 8a handle 9 Remote control device 14 ON operation switch 15 OFF operation switch 16 ON position detection switch 17 OFF position detection switch 18 Arithmetic processing circuit 20 Alarm switch (trip position detection switch)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shuji Hamanaga             1-1 Tanabe Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa             Within Fuji Electric Co., Ltd. F-term (reference) 5G030 AB01

Claims (3)

[Claims] 1. A remote control device for a circuit breaker, which is connected to a handle of a circuit breaker and drives the handle to an ON, OFF, or reset position based on a command from the outside, the device being a circuit breaker. It is a two-position operation type electromagnetic linear actuator that combines a mover with a permanent magnet connected to the handle and a stator with an operation coil wound around a yoke, and corresponds to the direction of the current passing through the operation coil. In the case where the handle of the circuit breaker is driven in the ON and OFF directions by the magnetic thrust acting between the stator and the mover, when the circuit breaker is turned OFF, the handle is between the ON position and the OFF position. When stopped, the mover of the electromagnetic linear actuator connected to the handle is returned from the stop position to the ON position and then turned off from the ON position. A remote operation device for a circuit breaker, characterized by comprising control means for switching the energization current of an operation coil so as to drive it toward a position. 2. The remote operation device according to claim 1, wherein as control means, an ON / OFF operation switch for externally issuing a circuit breaker opening / closing command and an ON / OFF switch for detecting the position of the mover of the electromagnetic linear actuator, A remote circuit breaker characterized by comprising an OFF position detection switch and an arithmetic processing unit for switching and controlling the direction of current flowing to the operation coil of the electromagnetic linear actuator based on signals from the operation switch and the position detection switch. Operating device. 3. The remote control device according to claim 2, wherein the control means is combined with an alarm switch for detecting a trip operation state of the circuit breaker, and the alarm switch detects the trip operation of the circuit breaker, and Only when the mover of the electromagnetic linear actuator is stopped between the ON position and the OFF position, return the mover connected to the handle from the stop position to the ON position, and then from the ON position to the OFF position. A remote operation device for a circuit breaker, characterized in that the energizing current of an operation coil is switched and controlled so that the circuit breaker is driven.